Dark Knight (Final Fantasy III)

Dark Knights are warriors of the dark blade. Their Soul Eater ability allows them to convert their life into extra damage.

In-game description

The (Dark Knight, まけんし?, lit. Makenshi) is a Job class obtained from the Water Crystal in Final Fantasy III. They are trained to harness the negative energies that flow throughout the world. The dark blades they wield are very effective against monsters that divide and multiply. In the original NES release of the game, the Dark Knight could cast White Magic similar to a Paladin.